I don't know whether they applied for the DTV and then came here before it was approved OR used an agency to get it while they were in thailand (where the agency said they were in another country)
I mean, you can't even select thailand as a location in the eVisa system
Some people who did sign up for those short 3 month classes to get a DTV were questioned when they came back into the country as far as if they were still enrolled or still attending what ever it was they signed up for to get the visa issue
BUT
most people are not questioned about it and it doesn't even say on the PDF that is your visa what soft power reason the visa was issued under so immigrations has no way of knowing
the seasoning at EVERY immigration office in the country for banked money funds on retirement extensions is the same. The 800K needs to be in the account for 2 months before you apply for your extension
Some 'renegade' offices tell people it's 3 months BUT it most definitely is not.
This is a translation of the seasoning requirements for banked money method on retirement
I have never heard that was a reqiurement at C/W when getting a new extension after previously getting them in a different province, and don't believe they will require those documents,
BUT
it's probably a good idea to have them IF you moved provinces/offices, just in case 🙂 I wouldn't give them to the officer when you apply, but have them if you're asked about it.
Make sure you have a new TM30, have been doing 90 day reporting at C/W (if you have had to) and have all the required documentation showing you now stay in Bangkok (lease, owners thai i/d, house book etc)
Also make sure you have the new photos, (you two standing in front of your address numbers, you two sitting inside the house [two/three photos].
These are the requirements to get a year extension based on marriage to a thai (just ignore the 400K baht financial requirements as foreign females married to thai males are exempt from that). This is not office specific, but is just a general list that will get you 'in the ballpark' 🙂
Any way you look at it you need to get the 90 day Non-O visa FIRST before you can do the year extension at the immigration office after it runs down.
You can't get a Non-O visa for a year from the thai consulate in vietnam, you get a 90 day Non-O visa from them (same as you'd get inside the country)
OR
You come in free stamp, visa exempt, get the 800K baht in a thai bank account in your name and then apply for the 90 day Non-O at the immigration office where you stay.